Dongguan Amperex Technology Limited

Guangdong, CN

Dongguan Amperex Technology Limited Patent applications

Patent application number

Title

Published

20150179989

FLEXIBLE BATTERY PACK - The present invention belongs to the technical field of batteries, and more particularly, relates to a flexible battery pack, comprising a packaging film, an electrolyte filled in the packaging film, and at least two electrically-connected cells encapsulated in the packaging film, wherein at least one of the cells is a flexible cell. Compared with the prior art, the flexible battery pack in the present invention is provided with a flexible cell that serves as the flexible part, so that cell bends at the flexible part so as to avoid the effect of stress on the performances of the cells, improve the stability of the cells and improve the bendability of the battery pack. Furthermore, the flexible battery pack in the present invention is further capable of reducing the phenomenon of irregular bending, lowering the bending pressure of the packaging film and prolonging the service life of the battery pack.

06-25-2015

20150140412

SOFT-PACKAGED LITHIUM-ION BATTERY - A soft-packaged lithium-ion battery includes: a battery cell, a package used for accommodating the battery cell and an electrolyte filled into the package, wherein the bottom and/or top of the battery cell are/is provided with a porous material layer. Compared with conventional art, the disclosure can realize a buffer function between the battery cell and the package by providing a porous material layer at the bottom and/or top of the battery cell, thereby reducing impact of the battery cell on the package and improving the reliability of the battery cell packaging. In addition, since the porous material layer has an excellent absorbent property, thereby increasing the contact area between the electrolyte and the battery cell, and realizing rapid infiltration of electrolyte in the battery cell with high-energy density and big thickness (thickness ≧4 mm).

05-21-2015

20150104671

POWER BATTERY - This invention belongs to the field of power battery technologies, and in particular, to a power battery. The power battery comprises a battery shell, a cell accommodated in the battery shell, an electrolyte filled inside the battery shell, and a top cover assembled in a sealed way to the battery shell; a cathode tab and an anode tab are positioned on a front end of the cell; and a cathode transit plate is positioned between the top cover and the cathode tab, wherein a melting region is positioned on the cathode transit plate. Compared with the prior art, this invention, by providing the melting region on the cathode transit plate, is capable of effectively separating the top cover from the cell thereby protecting the top cover from damages when an inner short-circuit or an outer short-circuit occurs on the battery; moreover, the melting region forms a fragile place for a current, and when a large current is generated due to an inner short-circuit or an outer short-circuit of the battery, the region where the melting region is located may melt immediately, where a melting position is accurate and sensitivity is high, thereby greatly improving safety performance of the battery. In addition, this invention has a simple structure, may be implemented easily, and may be applied for industrial production.

04-16-2015

20150050553

CELL - The present disclosure provides a cell, which has a stacked body composed of a first electrode plate, a second electrode plate and separators, the stacked body has a starting end and a terminal end, the first electrode plate is provided with a first electrode tab, the second electrode plate is provided with a second electrode tab, the cell has a main body portion formed by winding a part of the stacked body from the starting end of the stacked body and a folded portion formed by folding the rest of the stacked body from a distal end of the main body portion over the main body portion and covering a part of the main body portion The cell can be formed as a step-shaped configuration by directly and sufficiently utilizing winding without cutting or treating the electrode plate, the manufacturing process is simple.

02-19-2015

20140322587

SEPARATOR OF LITHIUM-ION-BATTERY PREPARATION AND METHOD THEREOF - The present disclosure relates to a separator of a lithium-ion battery and a preparation method thereof, the separator comprises a substrate membrane and a coating provided on a surface of the substrate membrane, the coating comprises ceramic particles, an adhesive and a solid polymer wax which has a melting point of 85˜120° C., a molecular weight of 1,000˜25,000 and a particle size of 0.5˜10 μm. When the lithium-ion battery is heated due to overcharge and the like to make the interior temperature reach the melting point of the solid polymer wax, the solid polymer wax can be melt and enter among the ceramic particles and into the micropores of the substrate membrane by capillarity so as to function as electrical disconnection, which can effectively cut off the channel of the lithium ions and stop the overcharge, and ensure the safety performance of the lithium-ion battery under the situation of overcharge.

10-30-2014

20140295267

SILICON BASED COMPOSITE MATERIAL, AND PREPARATION METHOD AND USE THEREOF - The present disclosure provides a silicon based composite material, and a preparation method and a use thereof. The silicon based composite material comprises silicon nano-particles and polyaniline coating layers on surfaces of the silicon nano-particles, and Si—C covalent bonds are formed between the silicon nano-particles and the polyaniline coating layers. The silicon based composite material provided by the present disclosure is advantageous in improving the coating effect of polyaniline on silicon particles.

10-02-2014

20140295265

Lithium-rich electrode sheet of lithium-ion battery and preparation method thereof - The present disclosure provides a lithium-rich electrode plate of a lithium-ion battery and a preparation method thereof. The lithium-rich electrode plate comprises a collector; a film containing an active material and forming on the collector, and forming an elementary electrode plate together with the collector; and a porous lithium sheet covering on the film, wherein a resulting capacity of the porous lithium sheet matches a planned lithium-supplemental capacity to an anode of a lithium-ion battery. The present disclosure can accurately control lithium-supplemental quantity to the anode, improve lithium-supplemental uniformity, improve the first coulombic efficiency, energy density, and electrochemical performance of the battery, and decrease deformation of the cell, furthermore the method can be performed simply and the cost thereof is low.

10-02-2014

20140017556

SOFT-PACKAGE LITHIUM BATTERY EDGEFOLD STRUCTURE - The invention discloses a soft-package lithium battery edgefold structure, comprising a side edge of a soft-package lithium battery and a double edgefold folded by using a packing aluminium foil of the cell of the soft-package lithium battery, wherein a glue layer is arranged between the double edgefold and the side edge, one side of the glue layer is glued with the side edge, while the other side of the glue layer is glued with the double edgefold. The invention has the advantages in that edge glue is needless, capable of preventing metal in the position of scrap edge from outleakage, preventing width of the battery cell at a fixed side edge from increasing, and being easier for realization of automatic production than usually applying edge glue.

01-16-2014

20130236765

POLYMER LI-ION BATTERY AND THE SEPARATOR THEREOF - The invention pertains to the technical field of a polymer Li-ion battery, in particular to a polymer Li-ion battery separator, comprising porous substrate, wherein at least one surface of the porous substrate is coated with an inorganic coating and an organic coating; the organic coating, shaped like an island and/or linear distribution, is coated on the surface of the porous substrate and/or the inorganic matter coating.

09-12-2013

20130149568

POWER BATTERY AND ANTI-EXPLOSION DEVICE THEREOF - The invention relates to the power battery technology, especially to a power battery and anti-explosion device thereof, comprising an anti-explosion disc disposed in an anti-explosion bore. The surface of the anti-explosion disc is attached with an anti-explosion ring and an anti-explosion patch, the anti-explosion ring and the anti-explosion patch are at the same side of the anti-explosion disc and the anti-explosion ring and the anti-explosion patch form an annular groove. Compared with the prior art, the anti-explosion device has a simple structure, accurate explosion pressure, high intensity and it is not easy to be damaged. When the power battery is abnormal in use and the inner side has high pressure, the anti-explosion disc will explode under certain pressure to prevent explosion of the battery. It improves the safety of the power battery.

06-13-2013

20120301774

INORGANIC/ORGANIC COMPOSITE POROUS SEPARATOR AND ELECTROCHEMICAL DEVICE USING THE SAME - Provided is an inorganic/organic composite porous separator including a porous substrate having pores and an active layer formed on the porous substrate. The active layer contains mixture of binder and inorganic particles. The inorganic/organic composite porous separator of the present invention has desirable anti-oxidation performance, and can prevent the separator from being oxidized in the lithium secondary battery using high voltage anode material. Also provided is a method for manufacturing the inorganic/organic composite porous separator and an electrochemical device using the same.

11-29-2012

20120251877

SECONDARY LITHIUM ION BATTERY - A secondary lithium ion battery includes an anode electrode having an anode current collector and an anode active material formed on the anode current collector, a cathode electrode having a cathode current collector and a cathode active material formed on the cathode current collector; a separator interposed between the anode electrode and the cathode electrode, and a nonaqueous liquid electrolyte. The anode active material contains lithium titanate and amorphous carbon. The hybrid anode electrode containing lithium titanate and amorphous carbon of the secondary lithium ion battery according to the present invention can reduce swelling of the secondary lithium ion battery during storage or cycle and prolong life span of the secondary lithium ion battery.

10-04-2012

20120237811

LITHIUM ION BATTERY - A lithium ion battery includes an anode plate and a cathode plate spirally coiled with a separator set between the anode plate and the cathode plate. The cathode plate includes a cathode current collector and a cathode film on the cathode current collector. The cathode current collector is formed with a number of cathode extending portions along a length direction thereof. The anode plate includes an anode current collector and an anode film on the anode current collector. The anode current collector is formed with a number of anode extending portions along a length direction thereof. After the cathode plate, the anode plate and the separator are coiled as a battery cell, the cathode extending portions are combined to form a cathode lead, and the anode extending portions are combined to form an anode lead. Before manufacture, the compacted cathode plate/anode plate is baked.

09-20-2012

20120156553

LITHIUM ION BATTERY - The present invention provides a lithium ion battery including a battery can, a battery cell received in the battery can, electrolyte filled in the battery can, and a battery cover sealing the battery can. The battery can is formed with a flange portion, and the battery cover is formed with a skirt portion corresponding to the flange portion. The skirt portion of the battery cover tightly wraps the flange portion of the battery can, and the skirt portion and the flange portion wrapped in the skirt portion are tightly wound and bent to the battery can, so as to realize desirable sealing between the battery can and the battery cover.

06-21-2012

20110052948

Cell Cap Assembly with Desirable Safety Performance - The present invention provides a cell cap assembly including a grommet defining a through hole, a stripper contact plate defining at least one gas hole securely received in the through hole, an rupture plate securely positioned in the through hole and in electrical connection with the stripper contact plate, and an end cap electrically connected with the rupture plate. The rupture plate includes an outer ring portion, a bent portion extending from the outer ring portion, and a planar recessed portion defining a recess formed at one end of the bent portion.

03-03-2011

20110039156

CATHODE PLATE OF A LITHIUM ION BATTERY AND METHOD FOR MANUFACTURING THE SAME - The present invention provides a cathode plate of a lithium ion battery. The cathode plate includes a carbon film cathode current collector and a cathode film containing cathode active material formed on the carbon film cathode current collector. The carbon film cathode current collector can remarkably improve the electrochemical performance and the safety performance of the lithium ion battery.

02-17-2011

20100330416

ELECTROLYTE INJECTION AND EXPLOSION PROOF DEVICE FOR USE IN POWER BATTERIES - An electrolyte injection and explosion proof device for use in power batteries includes a cover defining an electrolyte injection hole, a rupture plate detachably disposed on the electrolyte injection hole, and an inner liner pressing the rupture plate on the electrolyte injection hole for sealing the same. The rupture plate detachably mounted on the electrolyte injection hole via pressing or clamping can be readily replaced, so that the power battery can be continuously used when the rupture plate is broken. Additionally, the explosion proof device is mounted on the electrolyte injection hole. The number of holes defined in the cover is reduced and the sealing performance of the power battery is remarkably improved.

12-30-2010

20100330402

CAP ASSEMBLY WITH DESIRABLE SAFETY PERFORMANCE - A cap assembly with desirable safety performance for use in lithium ion batteries, includes an insulating gasket defining a through hole therein, a rupture plate positioned in the through hole, a vent plate defining an air hole electrically connected with the rupture plate, a current interrupt device disposed on the rupture plate, and an end cap defining an air exhaust hole assembled on the current interrupt device. The current interrupt device has an upper conductive plate electrically connected with the end cap, a lower conductive plate electrically connected with the rupture plate, and a fuse electrically connecting the upper conductive plate and the lower conductive plate. When the current intensity in the lithium ion battery exceeds a predetermined value, the fuse melts to cut off the current path.

12-30-2010

20100310926

BATTERY CELL OF A CYLINDRICAL LITHIUM ION BATTERY - A battery cell of a cylindrical lithium ion battery includes an anode plate and a cathode plate wounded together with an insulating separator disposed between the anode plate and the cathode plate. The anode plate includes an anode current collector and an anode film formed on the anode current collector. The anode current collector is formed with an anode exposed portion without the anode film formed thereon. The anode exposed portion is soldered with a number of anode terminals. The cathode plate includes a cathode current collector and a cathode film formed on the cathode current collector. The cathode current collector is provided with a cathode exposed portion without the cathode film formed thereon. The cathode exposed portion is soldered with a number of cathode terminals. The anode terminals and the cathode terminals are disposed at two opposite sides of the battery cell.

12-09-2010

20100291422

CAP ASSEMBLY FOR USE IN LITHIUM ION BATTERIES - Provided is a cap assembly for use in cylindrical lithium ion batteries. The cap assembly includes an insulating gasket defining a through hole therein, a rupture plate positioned in the through hole, a vent plate soldered on and electrically connected to the rupture plate, a current interrupt device positioned on the rupture plate, and an end cap assembled on the current interrupt device. The current interrupt device can cut off the current path when the battery discharges at a high discharge rate, so as to improve the safety performance of the lithium ion battery.

11-18-2010

20100173205

ELECTRODE GROUP FOR USE IN A LITHIUM ION BATTERY - An electrode group is configured for use in a lithium ion battery. The electrode group includes an anode plate and a cathode plate wound with a separator interposed therebetween. At least one metal oxide layer is disposed between the anode plate and the cathode plate. The metal oxide layer is provided at two length edges of the anode plate and/or the cathode plate, corresponding to the cutting edge of the cathode current collector where the cut burr formed in cutting process. Even though the cut burrs can pierce through the separator, the cut burrs still cannot contact the anode film. Any internal circuit short, caused by contact between the aluminum foil and the anode film, may therefore be avoided and, therefore, the performance of the lithium ion battery is remarkably improved.

07-08-2010

20100104940

BATTERY PACK FOR LITHIUM ION BATTERY CELLS - A battery pack configured for lithium ion battery cells includes an inner bonding layer, an intermediate stainless steel layer and an outer protective layer. Due to the arrangement of the intermediate stainless steel layer, the lithium ion battery cell having the battery pack in accordance with the present invention has desirable strength and energy density.